Exam 21: Human Development and Genetics

The expression of the genes a person has for a particular trait is called the ____________________.

The sex chromosomes in men are called ____________________.

In order for a dominant trait to appear in the phenotype:

A person who has two different genes for a particular trait is said to be:

Which of the following statements are true of the embryonic membranes? (Read carefully and select all of the correct statements.)

During labor, the hormone that causes strong contractions of the uterus is ____________________.

During gestation, the first 8 weeks are considered the ____________________ growth period.

If a trait may appear in a person's phenotype when only one gene is present for it, the trait is called ____________________.

The early embryonic stage that is a hollow sphere of cells with an inner cell mass is the ____________________.

The chorion is the embryonic membrane that contributes to the formation of the ____________________.

Which of the following statements are true of the infant at birth? (Read carefully and select all of the correct statements.)

The sex chromosomes in women are called ____________________.

Normal implantation of a blastocyst takes place in the ____________________ of the uterus.

In the early embryo, the liver and pancreas are derived from the:

In the placenta, oxygen and carbon dioxide move by the process of ____________________.

After birth, the fetal ductus arteriosus ____ so that ____ blood will flow to the fetal lungs.

Which statement is NOT true of the events surrounding fertilization?

Genetics problem: Mom is a carrier of red-green color blindness and Dad is red-green color-blind. What is the chance that their daughter will be color-blind?

Genetics problem: Both Mom and Dad are heterozygous for type B blood. The percent chance that a child of theirs will have type O blood is ____________________.

Mom and Dad both have type A blood. Their first child has type O blood. What does this tell us about Mom and Dad?